A picture of Mike Vrabel's forehead after he head-butted a player prior to a game against Michigan on Nov. 24. / Jen Vrabel

by Paul Myerberg, USA TODAY Sports

by Paul Myerberg, USA TODAY Sports

Ohio State defensive line coach Mike Vrabel, the former Super Bowl-winning linebacker with the New England Patriots, got so wrapped up in the Buckeyes' rivalry with Michigan on Nov. 24 that he head-butted a player during pregame warm-ups.

As you might expect, the player was wearing a helmet; Vrabel was helmet-free. The result was a bloody, gashed, stitch-filled, wonderful mess.

As Buzzfeed's Jack Moore notes, the Ohio State site Eleven Warriors was able to confirm the Vrabel-head-butt story by reaching out to his wife, Jen, via her Twitter account.